EP3586399A1 - Dispositif de sondage électromagnétique d'un échantillon - Google Patents

Dispositif de sondage électromagnétique d'un échantillon

Info

Publication number
EP3586399A1
EP3586399A1 EP17713144.8A EP17713144A EP3586399A1 EP 3586399 A1 EP3586399 A1 EP 3586399A1 EP 17713144 A EP17713144 A EP 17713144A EP 3586399 A1 EP3586399 A1 EP 3586399A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
metal body
antenna
antenna structure
receiver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17713144.8A
Other languages
German (de)
English (en)
Other versions
EP3586399B1 (fr
Inventor
Samuel LEHNER
Ralph MENNICKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proceq SA
Original Assignee
Proceq SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Proceq SA filed Critical Proceq SA
Priority to PL17713144T priority Critical patent/PL3586399T3/pl
Publication of EP3586399A1 publication Critical patent/EP3586399A1/fr
Application granted granted Critical
Publication of EP3586399B1 publication Critical patent/EP3586399B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/887—Radar or analogous systems specially adapted for specific applications for detection of concealed objects, e.g. contraband or weapons
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness

Definitions

  • the invention relates to a device for the non-destructive probing of a sample, in particular a structure of concrete, by means of electromagnetic wave reflection.
  • EP 2720065 describes a device of this type. It comprises a housing-like frame with four wheels. Elec- tromagnetic waves are sent into the sample by means of an antenna structure. Echo signals reflected back from the sample are received by the antenna structure and analyzed. Disclosure of the Invention
  • the problem to be solved by the present invention is to provide a device of this type that is easy to construct.
  • the device comprises:
  • An antenna structure This may be a single antenna acting as a sender and a receiver, or it may comprise two separate antennas for sending and receiving the signals, respectively.
  • the driver comprises at least the output stage of the electronics generating the probe sig- nal. It is electrically connected to the antenna structure for sending the probe signal through the same.
  • a receiver The receiver comprises at least the input stage of the electronics for receiving the echo signal. It is electrically connected to the antenna structure for receiving the echo signal through the same.
  • At least a first circuit board At least part of the driver and/or the receiver is arranged on this first circuit board.
  • At least a second circuit board At least a second circuit board: The antenna structure is arranged on this second circuit board.
  • This metal body is arranged in the frame (by forming part of the frame or by being mounted to the frame) .
  • the metal body has first and second opposite sides.
  • At least one electrical connector This connects the two circuit boards.
  • first circuit board is mounted to the first side of the metal body and the second circuit board is mounted to the second side of said circuit body.
  • this design allows a simple mounting of both circuit boards to opposite sides of the metal body as a common carrier.
  • the metal body forms a mount as well as a spacer between the two boards.
  • the metal body comprises a lateral wall that circumferentially encloses an interior space, i.e. that surrounds the interior space an all sides with the possible exception of the sides of the first and second sides.
  • the interior space is adjacent to the second side of the metal body, and the antenna structure is adjacent to the interior space.
  • This design electrically shields the interior space and therefore the side of the antenna structure that faces away from the sample.
  • the lateral wall extends laterally outside the antenna structure such that all of the antenna structure borders the interior space.
  • the metal body can further comprise a separating wall closing the interior space towards the first side. This separating wall shields the antenna structure from the circuit board carrying the driver and receiver.
  • the device can further comprise a damping structure, advantageously separate from the metal body, arranged in the interior space in order to absorb and thereby damp the waves emitted by the antenna structure into the metal body and to suppress reflections originating from that side.
  • the damping structure can comprise a conductive foam.
  • the metal body can further comprise a shielding structure that extends between the separating wall and the first circuit board. It forms several mutually shielded chambers between the separating wall and the first circuit board. This allows to shield different parts of the circuitry on the first circuit board from each other.
  • circuitry of the driver and circuitry of the receiver are backed by different shielded chambers, i.e. separate shielded chambers are located between the driver and the receiver circuitry and the separating wall.
  • the antenna structure comprises a sender antenna for sending the probe signal into the sample and a receiver antenna for receiving an echo of the probe signal reflected from the sample.
  • the metal body advantageously comprises a shield wall that shields the receiver antenna from the sender antenna in order to reduce direct crosstalk between these antennas.
  • the shield wall ends at the second circuit board, i.e. at the circuit board carrying the antenna structure.
  • the shield wall extends between the second circuit board and the separating wall and divides said interior space into a first chamber backing the sender antenna and a second chamber backing the receiver antenna.
  • “backing” is to be understood such that the respective chambers are located between the respective antennas and the separating wall.
  • the connector can be plugged into the first and/or the second circuit board, thereby forming a re- leasable connection for easier assembly and disassembly.
  • the present device can be used for probing the structure of any kind of sample, but it is advantageously used for probing the structure of concrete, e.g. of a building, tunnel or bridge.
  • Fig. 1 shows a view of a device
  • Fig. 2 shows a block circuit diagram of the device
  • Fig. 3 shows a metal body to be used in the device
  • Fig. 4 is a view of the metal body from its first side
  • Fig. 5 is a side view of the metal body
  • Fig. 6 is a view of the metal body from its second side
  • Fig. 7 is a sectional view along line B-B of
  • Fig. 8 is a sectional view along line C-C of
  • Fig. 9 is the sectional view of Fig. 7 including some parts of the electronics and the damping structure
  • Fig. 10 is the sectional view of Fig. 8 including some parts of the electronics and the damping structure.
  • Fig. 1 shows a device for determining the structure of a sample by means of electromagnetic reflection measurements.
  • It comprises a frame 2 forming a housing enclosing the electronic components of the device.
  • the device comprises a set of wheels 4, in particular four wheels, by means of which the device can be guided along the sample at a defined distance therefrom.
  • the device can e.g. also have only two or three wheels, or wheel-like components, such as rollers or sliders.
  • the housing comprises, at a side opposite to the wheels 4, a handle 6 to be gripped by the user.
  • the device also comprises input and output devices, such as a touchscreen 8.
  • Fig. 2 shows some of the electronic components within the device. These include, by way of example, the following parts:
  • a driver 10, 12 for generating a probe signal to be sent into the sample e.g. includes a digital section 10 as well as an analog section 12.
  • Digital section 10 can e.g. be used to generate a pulse or a CW signal, and analog section 12 can be used to amplify and/or modulate and/or filter this signal.
  • a receiver 14, 16 for receiving an echo signal from the sample. It can e.g. include an analogue section 14 for filtering and/or demodulating and/or amplifying the received signal as well as a digital section 16 for further signal processing.
  • antenna structure 18 for sending the probe signal into the sample and for receiving the echo signal reflected therefrom.
  • antenna structure 18 comprises a sender antenna 20 and, separate from the sender antenna 20, a receiver antenna 22.
  • Driver 10, 12 is connected to sender antenna 20 and receiver 14, 16 is connected to receiver antenna 22.
  • control unit 24 for controlling the components in the device, for operating screen 8 and for communication with external circuitry.
  • control unit 24 In operation, the user typically moves the device along the sample while control unit 24 performs a stream of measurements.
  • Control unit 24, or circuitry external to the device can use the recorded data in order to determine the sample's internal structure, e.g. using SAFT (Synthetic Aperture Focusing Technique) technology as it is known to the skilled person.
  • SAFT Synthetic Aperture Focusing Technique
  • a core of the device of Fig. 1 is formed by a metal body 30.
  • This metal body can e.g. form the bottom side of frame 2. It is shown in Figs. 2 - 8.
  • Metal body 30 is advantageously a single piece of cast and/or worked metal, in particular aluminum. It comprises a first side 32 and a second side 34 (Figs. 5, 7, 8). In operation, first side 32 is facing away from the sample, while second side 34 is located on the side of frame 2 where the wheels 4 are mounted, i.e. second side 34 faces the sample to be measured.
  • Metal body 30 comprises a base plate 36 (Figs. 7, 8) at its second side 34. It forms a wall of frame 2 towards the sample.
  • An opening 38 is arranged in base plate 36.
  • metal body 30 On the side of base plate 36 that faces away from second side 34, metal body 30 forms a lateral wall 40 that extends around opening 38. Lateral wall 40 is advantageously aligned perpendicularly to base plate 36.
  • Lateral wall 40 encloses, i.e. runs around, an interior space 42, 43.
  • Metal body 30 further forms a separating wall 44. It extends parallel to, and at a distance from, base plate 36 and borders interior space 42, 43.
  • Metal body 30 further forms a shield wall 45. It is perpendicular to base plate 36 and extends between two opposite sides of lateral wall 40, thereby dividing interior space 42, 43 into a first chamber 42 and a second chamber 43. Shield wall 45 extends between second side 34 (namely opening 38) and separating wall 44.
  • metal body 30 forms a shielding structure 46a - 46e (see Figs. 3, 4, generally denoted by reference number 46 in the following) formed by a plurality of raised structures on the side of separating wall 44.
  • Shielding structure 46 faces first side 32. It extends between separating wall 44 and first side 32 (i.e. between separating wall 44 and the first circuit board 54 mentioned below) and forms several, mutually shielded chambers 48a - 48e (which are, in the following generally denoted by reference number 48 and shown in Fig. 4) .
  • Metal body 30 further forms wheel holders 50 for holding bearings for the wheels 4 and therefore for holding the wheels 4.
  • Base plate 36 extends between lateral wall 40 and the wheel holders 50, thereby connecting these parts.
  • frame 2 of the device further comprises a cover 52 mounted to the second side of metal body 30 and forming an upper side of the device's housing.
  • Handle 6 is mounted to cover 52 or forms a part thereof.
  • metal body 30 is used for mounting two circuit boards 54, 56.
  • a first circuit board 54 is attached to first side 32 of metal body 30, namely to shielding structure 46, e.g. by means of screws (sitting in screw openings some of which are denoted with reference number 58 in Fig. 4) .
  • Shielding structure 46 extends along the edge of first circuit board 54 thereby shielding it.
  • a second circuit board 56 is attached to second side 34 of metal body 30, again e.g. by means of screws (sitting in screw openings, some of which are denoted with reference number 50 in Fig. 6) .
  • Second circuit board 56 is mounted over opening 38 (Fig. 7, 8) .
  • Lateral wall 40 extends along the edge of second circuit board 56 thereby shielding it.
  • First circuit board 54 holds at least part of the electronics of driver 10, 12 and/or of receiver 14, 16. Advantageously, it holds at least the analog parts 12 and 14 thereof.
  • First circuit board 54 can be a multi-layer PCB comprising a shield layer 62 that provides radio frequency shielding to the components above it.
  • a shield layer 62 that provides radio frequency shielding to the components above it.
  • at least some of the electronic components of the sender 10, 12 and/or the receiver 14, 16 are on the side of shield layer 62 that faces second side 34 of metal body 30 in order to be shielded.
  • Second circuit board 56 holds the two antennas 20, 22, which can e.g. be implemented as circular conductive regions or in a bow-tie arrangement structured in a conductive layer of second circuit board 56.
  • the device further comprises a damping structure 58 arranged in interior space 42, 43, namely in first chamber 42 and second chamber 43.
  • Damping structure 58 is an extended structure, advantageously separate from metal body 30. It is designed to absorb electromagnetic radiation (of the frequencies used by the device) without reflecting it.
  • damping structure 58 can be a conductive foam, e.g. a foam comprising graphite.
  • separating wall 44 is advantageously closer to first circuit board 54 than to second circuit board 56.
  • antenna structure 18 i.e. both antennas 20, 22, is backed by interior space 42, 43 such that all the backside of antenna structure 18 is damped.
  • first chamber 42 is arranged at the backside of antenna 20 and second chamber 43 is arranged at the backside of antenna 22.
  • the antennas 20, 22 on second circuit board 56 have to be electrically connected to first circuit board 54.
  • the present device is provided with at least one electrical connector 60 extending between first and second circuit boards 54, 56.
  • this electrical connector is plugged into one or both of the circuit boards 54, 56.
  • Each connector 60 is a rigid rod having a first plug 62 plugged into first circuit board 54 and/or a second plug 64 plugged into second circuit board 56.
  • each connector extends perpendicularly to the circuit boards 54, 56.
  • separating wall 44 For each connector 60, separating wall 44 comprises an opening 66 (Figs. 4 and 6) with the connector 60 extending through it. Notes:
  • each of the first and second circuit boards 54, 56 is formed by a single board, it is possible to assemble each of them from two or more boards, each such board only holding part of the circuitry and antenna structure, respectively.
  • using single boards is advantageous because it makes it easier to assemble the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Thermistors And Varistors (AREA)

Abstract

L'invention concerne un dispositif comprenant un corps métallique (30) en tant que partie de son cadre (2), le corps métallique forme une paroi latérale (40) et une paroi de séparation (44) entourant un espace intérieur (42, 43). Sur un premier côté (32) du corps métallique (30), une structure de blindage (46) forme une pluralité de chambres blindées (48) pour recevoir des circuits RF. Un espace intérieur (42, 43) est tourné vers le second côté (34) du corps métallique (30), une première carte de circuit imprimé (54) contenant un circuit d'attaque et de récepteur est montée sur le premier côté (32) du corps métallique (30), et une seconde carte de circuit imprimé (56) contenant une structure d'antenne (20, 22) est montée sur le second côté de celui-ci.
EP17713144.8A 2017-03-10 2017-03-10 Dispositif de sondage électromagnétique d'un échantillon Active EP3586399B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17713144T PL3586399T3 (pl) 2017-03-10 2017-03-10 Urządzenie do elektromagnetycznego sondowania próbki

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2017/000027 WO2018161182A1 (fr) 2017-03-10 2017-03-10 Dispositif de sondage électromagnétique d'un échantillon

Publications (2)

Publication Number Publication Date
EP3586399A1 true EP3586399A1 (fr) 2020-01-01
EP3586399B1 EP3586399B1 (fr) 2021-03-31

Family

ID=58410052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17713144.8A Active EP3586399B1 (fr) 2017-03-10 2017-03-10 Dispositif de sondage électromagnétique d'un échantillon

Country Status (8)

Country Link
US (1) US11543515B2 (fr)
EP (1) EP3586399B1 (fr)
JP (1) JP7021244B2 (fr)
CA (1) CA3055443A1 (fr)
ES (1) ES2865510T3 (fr)
PL (1) PL3586399T3 (fr)
RU (1) RU2725700C1 (fr)
WO (1) WO2018161182A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715706B (zh) * 2019-11-25 2021-08-13 重庆宇虹自动化仪表系统有限公司 便携式酱香陶坛无损参数检测仪

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0349110B1 (fr) * 1988-05-27 1992-03-11 British Gas plc Procédé et dispositif de mesure radar dans le sol
AU7908698A (en) * 1997-07-02 1999-01-25 Ekko Dane Production A/S Radar plant and measurement technique for determination of the orientation and the depth of buried objects
US7180440B2 (en) * 2001-02-03 2007-02-20 Robert Bosch Gmbh Integrated circuit for a radar device in a hermetically sealed housing comprising a patch antenna formed from a bent component from sheet metal
US7196655B1 (en) * 2003-10-27 2007-03-27 Atr Electronics, Inc. System and method for highly directional electronic identification and communication and combat identification system employing the same
RU2282875C1 (ru) * 2005-03-03 2006-08-27 Вячеслав Адамович Заренков Устройство зондирования строительных конструкций
US7518880B1 (en) * 2006-02-08 2009-04-14 Bi-Link Shielding arrangement for electronic device
USD630268S1 (en) * 2009-11-25 2011-01-04 John Cunningham Remote controlled vehicle
US9194950B2 (en) * 2012-01-19 2015-11-24 Black & Decker Inc. Handheld locating device
US9073347B2 (en) 2012-10-11 2015-07-07 Geophysical Survey Systems, Inc. Hand-held radar device with direct printing based on radar input
DE102012111183A1 (de) * 2012-11-20 2014-05-22 Conti Temic Microelectronic Gmbh Radareinrichtung für ein Fahrzeug
DE102014218364A1 (de) * 2014-09-12 2016-03-17 Robert Bosch Gmbh Handmessgerät und Verfahren zu dessen Betrieb
US10074907B2 (en) * 2015-03-12 2018-09-11 Veoneer Us, Inc. Apparatus and method for mitigating multipath effects and improving absorption of an automotive radar module

Also Published As

Publication number Publication date
JP7021244B2 (ja) 2022-02-16
PL3586399T3 (pl) 2021-09-06
JP2020512687A (ja) 2020-04-23
ES2865510T3 (es) 2021-10-15
RU2725700C1 (ru) 2020-07-03
US20210141081A1 (en) 2021-05-13
WO2018161182A1 (fr) 2018-09-13
US11543515B2 (en) 2023-01-03
CA3055443A1 (fr) 2018-09-13
EP3586399B1 (fr) 2021-03-31

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